Practice - Efficient Use of Energy
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Practice Questions
Test your understanding with targeted questions
What does energy efficiency mean?
💡 Hint: Think about how we can save energy at home.
Give an example of an energy-efficient appliance.
💡 Hint: Consider what devices you use daily.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary goal of energy efficiency?
💡 Hint: Think of ways to maintain comfort while reducing energy use.
True or False: Energy-efficient appliances typically cost more upfront but save money in the long run.
💡 Hint: Consider the long-term savings vs. initial investment.
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Challenge Problems
Push your limits with advanced challenges
If an LED light bulb uses 10 watts of power for 5 hours a day, calculate the total energy consumption in kilowatt-hours for one month.
💡 Hint: Remember to convert watts to kilowatts!
A refrigerator rated at 300 kWh/year is replaced with a model rated at 200 kWh/year. Calculate the annual savings in energy consumption.
💡 Hint: Simply find the difference in energy consumption.
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Reference links
Supplementary resources to enhance your learning experience.